WO2024046163A1 - Dispositif de chauffage de batterie et véhicule - Google Patents

Dispositif de chauffage de batterie et véhicule Download PDF

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Publication number
WO2024046163A1
WO2024046163A1 PCT/CN2023/114074 CN2023114074W WO2024046163A1 WO 2024046163 A1 WO2024046163 A1 WO 2024046163A1 CN 2023114074 W CN2023114074 W CN 2023114074W WO 2024046163 A1 WO2024046163 A1 WO 2024046163A1
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WO
WIPO (PCT)
Prior art keywords
target
battery module
bridge arm
battery
turned
Prior art date
Application number
PCT/CN2023/114074
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English (en)
Chinese (zh)
Inventor
凌和平
闫磊
邹林利
王政溥
高文
Original Assignee
比亚迪股份有限公司
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Publication date
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Publication of WO2024046163A1 publication Critical patent/WO2024046163A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/24—Using the vehicle's propulsion converter for charging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching

Definitions

  • the present disclosure relates to the technical field of battery heating, and in particular, to a battery heating device and a vehicle.
  • An object of the present disclosure is to provide a battery heating device and vehicle.
  • a first aspect of the present disclosure provides a battery heating device, including a controller, a power battery, a target winding and a target bridge arm.
  • the power battery includes a first battery module and a second battery module connected in series. ;
  • the first end of the target winding is connected to the negative electrode of the first battery module and the positive electrode of the second battery module, and the second end of the target winding is connected to the midpoint of the target bridge arm;
  • the first end of the target bridge arm is connected to the positive electrode of the first battery module, and the second end of the target bridge arm is connected to the negative electrode of the second battery module;
  • the controller is connected to the target bridge arm, and the controller is configured to: in the parking heating mode, control the target bridge arm so that the first battery module and the second battery module The batteries alternately charge and discharge to achieve heating of the power battery.
  • it further includes:
  • the first end of the load is connected to the first end of the target bridge arm, and the second end of the load is connected to the The second end of the target bridge arm is connected;
  • the controller is configured to:
  • the target bridge arm is controlled so that the first battery module and the second battery module jointly power the load, and the first battery module and the third battery module are realized. Balance between two battery modules.
  • the controller when the first voltage of the first battery module is greater than the second voltage of the second battery module, the controller is configured to:
  • the upper bridge arm of the target bridge arm is controlled to be turned on and the lower bridge arm is turned off.
  • the first battery module and the second battery module are jointly connected to the target bridge arm.
  • the load supplies power, and the target winding stores energy
  • the lower bridge arm of the target bridge arm is controlled to be turned on and the upper bridge arm is turned off, and the first battery module and the second battery module are jointly connected to the target bridge arm.
  • the load is powered, and the target winding releases the stored energy to charge the second battery module.
  • the controller when the first voltage of the first battery module is less than the second voltage of the second battery module, the controller is configured to:
  • the lower bridge arm of the target bridge arm is controlled to be turned on and the upper bridge arm is turned off.
  • the first battery module and the second battery module are jointly connected to the target bridge arm.
  • the load supplies power, and the target winding stores energy
  • the upper bridge arm of the target bridge arm is controlled to be turned on and the lower bridge arm is turned off, and the first battery module and the second battery module are jointly connected to the target bridge arm.
  • the load is powered, and the target winding releases the stored energy to charge the first battery module.
  • the controller is configured to:
  • control the target bridge arm In the first half cycle in the parking heating mode, control the target bridge arm to cause the first battery module to discharge to charge the second battery module;
  • control the target bridge arm In the second half cycle in the parking heating mode, control the target bridge arm to cause the second battery module to discharge to charge the first battery module
  • the first half-cycle and the second half-cycle are executed alternately.
  • the controller is configured to:
  • the upper bridge arm of the target bridge arm is controlled to be turned on, and the lower bridge arm is turned off, the first battery module is discharged, and the The target winding stores energy;
  • the lower bridge arm of the target bridge arm is controlled to be turned on and the upper bridge arm is turned off, and the target winding releases the stored energy to provide the The second battery module is charged.
  • the controller is configured to:
  • the lower bridge arm of the target bridge arm is controlled to be turned on, and the upper bridge arm is turned off, the second battery module is discharged, and the The target winding stores energy
  • the upper bridge arm of the target bridge arm is controlled to be turned on and the lower bridge arm is turned off, and the target winding releases the stored energy to provide the The first battery module is charged.
  • the present disclosure further includes a bus capacitor, a first end of the bus capacitor is connected to the first end of the target bridge arm, and a second end of the bus capacitor is connected to the third end of the target bridge arm. Two-terminal connection; the load includes at least one driving load;
  • the controller is configured to:
  • the target bridge arm is controlled to cause the first battery module to discharge, and the first battery module or the bus capacitor supplies power to the driving load to drive the vehicle. , and charge the second battery module;
  • the target bridge arm is controlled to cause the second battery module to discharge, and the second battery module or the bus capacitor supplies power to the driving load to drive the vehicle. , and charge the first battery module.
  • the controller is configured to:
  • the upper bridge arm of the target bridge arm is controlled to be turned on and the lower bridge arm is turned off, the first battery module is discharged, and the target winding is Energy storage, and the bus capacitor supplies power to the driving load;
  • the lower bridge arm of the target bridge arm is controlled to be turned on, and the upper bridge arm is turned off, and the first battery module is discharged to serve as the bus capacitance.
  • the target winding releases the stored energy to the second battery module to charge the second battery module.
  • the controller is configured to:
  • the lower arm of the target bridge arm is controlled to be turned on and the upper bridge arm is turned off, the second battery module is discharged, and the target winding is Energy storage, and the bus capacitor supplies power to the driving load;
  • the upper bridge arm of the target bridge arm is controlled to be turned on, And the lower bridge arm is turned off, the second battery module is discharged to charge the bus capacitor and power the drive load, and the target winding releases the stored energy to the first battery module to provide power to the drive load.
  • the first battery module is charged.
  • the bridge arm of the motor controller is multiplexed as the target bridge arm, and the coil of the motor is multiplexed as the target winding.
  • it further includes a first target switch, a first end of the first target switch is connected to the negative electrode of the first battery module and the positive electrode of the second battery module, and the first The second end of the target switch is connected to the N line drawn from the motor;
  • the controller is configured to: when receiving a driving instruction, control the first target switch to turn off to perform the driving mode;
  • the first target switch When receiving a parking heating request command, a driving heating request command, or a balanced heating power supply request command, the first target switch is controlled to be turned on to enter the corresponding mode.
  • it further includes:
  • a second target switch The first end of the second target switch is connected to the negative electrode of the first battery module and the positive electrode of the second battery module.
  • the second end of the second target switch is connected to the motor. N line connection;
  • a third target switch the first end of the third target switch is connected to the N line drawn from the motor, and the second end of the third target switch is connected to the motor of the electric drive system;
  • the controller is configured to: in the multi-electric drive cooperative driving mode, control the second target switch to open and the third target switch to close or open to achieve multi-electric drive coordinated driving;
  • the second target switch is controlled to be closed and the third target switch is opened to enter the corresponding mode.
  • a second aspect of the present disclosure provides a vehicle including the battery heating device described in the first aspect above.
  • the above technical solution provides a battery heating device, including a controller, a power battery, a target winding and a target bridge arm.
  • the power battery includes a first battery module and a second battery module connected in series; the target winding The first end of the target winding is connected to the negative electrode of the first battery module and the positive electrode of the second battery module, and the second end of the target winding is connected to the midpoint of the target bridge arm; the third end of the target bridge arm is One end is connected to the positive electrode of the first battery module, and the second end of the target bridge arm is connected to the negative electrode of the second battery module; the controller is connected to the target bridge arm, and the The controller is configured to: in the parking heating mode, control the target bridge arm to alternately charge and discharge the first battery module and the second battery module to achieve heating of the power battery.
  • the first battery module and the second battery module can be connected to the same target winding, and by controlling the target bridge arm, the The first battery module and the second battery module are alternately charged and discharged through the target winding, which can not only meet the heating requirements of the power battery, but also stagger charging, thereby ensuring the stability of the total voltage of the power battery, which is beneficial to improving Reliability of vehicle power supply.
  • Figure 1 is a schematic diagram illustrating the principle of internal heating of a battery according to an exemplary embodiment of the present disclosure
  • Figure 2 is a circuit diagram of a battery heating device according to an exemplary embodiment of the present disclosure
  • Figure 3 is a schematic diagram of the current flow during the heating process of a power battery according to an exemplary embodiment of the present disclosure
  • Figure 4 is a schematic diagram of the current flow of a winding discharge process according to the embodiment shown in Figure 3;
  • Figure 5 is a schematic diagram of the current flow of a winding power storage process according to an exemplary embodiment of the present disclosure
  • Figure 6 is a schematic diagram of the current flow of a winding discharge process according to the embodiment shown in Figure 5;
  • Figure 7 is a schematic diagram of the current flow of another winding power storage process according to an exemplary embodiment of the present disclosure.
  • Figure 8 is a schematic diagram of the current flow of a winding discharge process according to the embodiment shown in Figure 7;
  • Figure 9 is a schematic diagram of the current flow of yet another winding power storage process according to an exemplary embodiment of the present disclosure.
  • Figure 10 is a schematic diagram of the current flow of a winding discharge process according to the embodiment shown in Figure 9;
  • Figure 11 is a schematic diagram of the current flow of another winding power storage process according to an exemplary embodiment of the present disclosure.
  • Figure 12 is a schematic diagram of the current flow of a winding discharge process according to the embodiment shown in Figure 11;
  • Figure 13 is a schematic diagram of the current flow of another winding power storage process according to an exemplary embodiment of the present disclosure
  • Figure 14 is a schematic diagram of the current flow of a winding discharge process according to the embodiment shown in Figure 13;
  • Figure 15 is a circuit diagram of a battery heating device according to the embodiment shown in Figure 2;
  • FIG. 16 is a circuit diagram of another battery heating device according to the embodiment shown in FIG. 2 .
  • the present disclosure can be applied to battery heating scenarios, for example, heating of power batteries in vehicles, and electronic heating in low-temperature environments.
  • the battery in the device undergoes a heating process.
  • the heating of the power battery is taken as an example.
  • Most vehicle heating methods in related technologies are: PTC (Positive Temperature Coefficient, thermistor) is used to heat the power battery at low temperatures.
  • the heating principle is that when the power battery is detected When the temperature is too low, the internal switch tube of the battery heater is turned on, causing the heating resistor to be energized, thereby generating high temperature.
  • the generated high temperature flows into the power battery through the water channel or air duct, thereby increasing the temperature of the power battery.
  • Some vehicles also use internal heating. Even if a large current flows through the internal resistance of the battery, the internal resistance of the battery generates heat (if the equivalent internal resistance of the battery is r, the current i, and the time t, the heat generated by the internal resistance is i 2 rt).
  • the vehicle's high-voltage system requires additional power distribution to the battery heater (such as thermistor), and also needs to distribute power to water ducts or air ducts, pipelines, low-voltage systems, etc., thus resulting in a total cost Increase; and in order to increase the heating speed, the power of the battery heater is further increased, resulting in high energy loss of the power battery during heating, rapid power loss of the power battery SOC during winter driving, and shortened vehicle cruising range; in addition, there is a battery temperature field in external heating The problem of uneven distribution (the parts close to the outside and close to the heat source have high temperatures, and the parts far away from the heat source and inside the power battery have low temperatures).
  • FIG. 1 is a schematic diagram illustrating the principle of internal heating of a battery according to an exemplary embodiment of the present disclosure
  • Uocv is the open circuit voltage of the battery
  • r is the equivalent internal resistance of the battery.
  • the present disclosure provides a battery heating device and a vehicle, including a controller, a power battery, a target winding and a target bridge arm.
  • the power battery includes a first battery module and a second battery module connected in series.
  • the first end of the target winding is connected to the negative electrode of the first battery module and the positive electrode of the second battery module, and the second end of the target winding is connected to the midpoint of the target bridge arm;
  • the first end of the target bridge arm is connected to the positive electrode of the first battery module, and the second end of the target bridge arm is connected to the negative electrode of the second battery module;
  • the controller is connected to the target The bridge arm is connected, and the controller is configured to: in the parking heating mode, control the target bridge arm to alternately charge and discharge the first battery module and the second battery module to achieve the Heating of power battery.
  • the first battery module and the second battery module can be connected to the same target winding, and by controlling the target bridge arm, the first battery module and the second battery module pass through the Alternating charging and discharging around the target can not only meet the heating needs of the power battery, but also stagger charging, thereby ensuring the stability of the total voltage of the power battery, which is beneficial to improving the reliability of the vehicle's power supply.
  • FIG. 2 is a circuit diagram of a battery heating device illustrating an exemplary embodiment of the present disclosure
  • the battery heating device includes a controller 201, a power battery 202, a target winding 203, a target bridge arm 204, the power
  • the battery 202 is formed by a first battery module 1 and a second battery module 2 connected in series;
  • the first end of the target winding 203 is connected to the negative electrode of the first battery module 1 and the positive electrode of the second battery module 2, and the second end of the target winding 203 is connected to the midpoint of the target bridge arm;
  • the first end of the target bridge arm 204 is connected to the positive electrode of the first battery module 1, and the second end of the target bridge arm 204 is connected to the negative electrode of the second battery module 2;
  • the controller 201 is connected to the target bridge arm 204, and the controller is configured to: in the parking heating mode, control the target bridge arm 204 so that the first battery module 1 is connected to the third battery module 1.
  • the two battery modules 2 alternately charge and discharge to achieve heating of the power battery.
  • the heating device further includes a load, the first end of the load is connected to the first end of the target bridge arm, and the second end of the load is connected to the second end of the target bridge arm;
  • the controller 201 is configured as:
  • the target bridge arm 204 is controlled so that the first battery module 1 and the second battery module 2 jointly supply power to the load, and realize the first battery module and Balance between the second battery modules.
  • the controller is connected to the control end of the target bridge arm 204.
  • the target winding 203 can be a single-phase winding or a multi-phase winding, such as a three-phase winding, a six-phase winding, etc., and each phase winding It can be an inductor, a motor winding in a multiplexing device, or other components with energy storage characteristics.
  • Both the first battery module 1 and the second battery module 2 can be composed of multiple cells connected in series. Or components formed in parallel, the number of series and parallel cells may be equal or unequal.
  • the bridge arms included in the target bridge arm 204 correspond one-to-one to the windings in the target winding.
  • the target winding 203 includes a polyphase winding
  • the target bridge arm 204 includes a plurality of bridge arms
  • the midpoint of the target bridge arm 204 is formed by the midpoint terminal of each bridge arm
  • the first end of the target winding 204 includes each The first end of the phase winding and the second end of each phase winding are respectively connected to the midpoint terminal of a bridge arm.
  • Each bridge arm includes an upper bridge arm and a lower bridge arm.
  • the upper bridge arm may include an upper bridge switch
  • the lower bridge arm may include a lower bridge switch.
  • the controller 201 may be used to control the conduction of the upper bridge switch of at least one of the plurality of bridge arms. , to realize that the upper bridge arm is turned on, and the upper bridge switch tube is turned off, to realize that the upper bridge arm is turned off.
  • the upper bridge switch tube and the lower bridge switch tube can be IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), or MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, metal oxide semi-field effect transistor) ), or other thyristors, to provide a path for the heating current.
  • it also includes a load (for example, motor electronic control 1 and motor electronic control 2 shown in Figure 3), which is connected to the positive and negative poles of the power battery, and the controller 201 is used in the vehicle.
  • the target bridge arm In the non-heating mode, the target bridge arm is controlled to be closed, and the first battery module and the second battery module are controlled to jointly supply power to the load.
  • the above technical solution enables the first battery module 1 and the second battery module 2 to be connected to the same winding, and by controlling the target bridge arm 204, the first battery module and the second battery module By alternating charging and discharging around the target, it can not only meet the heating needs of the power battery, but also stagger charging, thereby ensuring the stability of the total voltage of the power battery, which is beneficial to improving the reliability of the vehicle's power supply.
  • the controller 201 is used to control the first battery module 1 and the second battery module 2 to discharge together, and obtain the first The first voltage of the battery module 1 and the second voltage of the second battery module 2. If the first voltage is less than the second voltage, the upper bridge switch transistor of at least one of the plurality of bridge arms is controlled. The lower bridge switch tube is alternately turned on, and the lower bridge switch tube is first turned on with the upper bridge switch tube, so that the second battery module charges the first battery module through the target winding.
  • the voltage equalization heating mode is automatically entered, and can also be triggered by prompting the user.
  • the method of entering the voltage balancing heating mode instruction is to enter the voltage balancing heating mode. For example, in response to receiving the target instruction triggered by the user through a designated button, the current heating mode of the vehicle can be determined as the voltage balancing heating mode.
  • the lower bridge switch tube of at least one bridge arm among the plurality of bridge arms is first controlled to be turned on, the upper bridge switch tube is turned off, and then controlled after a preset time period.
  • the lower bridge switch tube is turned off, and the upper bridge switch tube is turned on, in an alternating manner, so that the second battery module supplies electricity to the second battery module when the lower bridge switch tube of at least one bridge arm is turned on and the upper bridge switch tube is turned off.
  • the target winding stores electricity. When the lower bridge switch is turned off and the upper bridge switch is turned on, the target winding is discharged to charge the first battery module.
  • the controller 201 when the first voltage of the first battery module is greater than the second voltage of the second battery module, the controller 201 is configured to: in the balanced heating power supply mode for the first time segment, control the target The upper bridge arm of the bridge arm is turned on and the lower bridge arm is turned off. The first battery module and the second battery module jointly supply power to the load, and the target winding stores energy; during balanced heating During the second time period of the power supply mode, the lower bridge arm of the target bridge arm is controlled to be turned on and the upper bridge arm is turned off. The first battery module and the second battery module jointly supply power to the load. , and the target winding releases the stored energy to charge the second battery module.
  • the controller when the first voltage of the first battery module is less than the second voltage of the second battery module, the controller is configured to: during the first period of time in the balanced heating power supply mode Within, the lower bridge arm of the target bridge arm is controlled to be turned on and the upper bridge arm is turned off. The first battery module and the second battery module jointly supply power to the load, and the target winding performs Energy storage; in the second time period of the balanced heating power supply mode, control the upper bridge arm of the target bridge arm to be turned on and the lower bridge arm to be turned off, the first battery module and the second battery module Together, the loads are powered, and the target winding releases the stored energy to charge the first battery module.
  • the two ends of the power battery are also connected to the motor electronic control 1 and the motor electronic control 2, where the motor electronic control refers to Motor controllers and motors.
  • FIG 3 is a schematic diagram of the current flow during the heating process of a power battery according to an exemplary embodiment of the present disclosure.
  • the bridge arm is controlled.
  • the upper bridge switch 4 is turned on, and the lower bridge switch 5 is turned off, storing electricity to the winding 3.
  • the current direction on the winding 3 is the direction shown by the internal arrow in Figure 3.
  • the control The upper bridge switch 4 of the bridge arm is turned off, and the lower bridge switch 5 is turned on, thereby entering the stage of discharging the winding 3 and charging the second battery module 2, as shown in Figure 4.
  • Figure 4 is based on the figure Embodiment 3 shows a schematic diagram of the current flow direction during the winding discharge process.
  • the current direction on the winding 3 is the inner arrow in Figure 4 direction shown.
  • the first voltage of the first battery module 1 is less than the second voltage of the second battery module 2.
  • the lower bridge switch 5 that controls the bridge arm is turned on, and the upper bridge switch 4 is turned off, supplying energy to the winding 3. electricity, the direction of current on the winding 3 during the electricity storage process is the direction indicated by the inner arrow in Figure 5 (Fig. 5 is a schematic diagram of the current flow direction of a winding electricity storage process according to an exemplary embodiment of the present disclosure).
  • the lower bridge switch 5 that controls the bridge arm is turned off, and the upper bridge switch 4 is turned on, thereby discharging the winding 3 and charging the first battery module 1, as shown in Figure 6.
  • Figure 6 is based on The embodiment shown in FIG. 5 shows a schematic diagram of the current flow during the winding discharge process. In the charging stage of the first battery module 1 , the current direction on the winding 3 is the direction indicated by the inner arrow in FIG. 6 .
  • the above technical solution realizes that the first battery module 1 and the second battery module 2 are connected in series to supply power to the load (motor electronic control 1 and motor electronic control 2) through the alternating cycle of Figure 3 and Figure 4, while completing the first battery Module 1 is the second circuit During the charging process of battery module 2, through the alternating cycle of Figure 5 and Figure 6 above, the first battery module 1 and the second battery module 2 are connected in series to supply power to the load, and at the same time, the second battery module 2 is completed as the third battery module. The process of charging the second battery module 1.
  • the controller 201 is configured to: control the target bridge arm during the first half cycle in the parking heating mode so that the first battery module discharges to provide the second battery module with group charging; in the second half cycle in the parking heating mode, control the target bridge arm so that the second battery module discharges to charge the first battery module; the first half cycle and the The second half cycle is executed alternately.
  • the controller 201 is configured to:
  • the upper bridge arm of the target bridge arm is controlled to be turned on, and the lower bridge arm is turned off, the first battery module is discharged, and the The target winding stores energy;
  • the lower bridge arm of the target bridge arm is controlled to be turned on and the upper bridge arm is turned off, and the target winding releases the stored energy to provide the The second battery module is charged.
  • the controller is configured to:
  • the lower bridge arm of the target bridge arm is controlled to be turned on, and the upper bridge arm is turned off, the second battery module is discharged, and the The target winding stores energy
  • the upper bridge arm of the target bridge arm is controlled to be turned on and the lower bridge arm is turned off, and the target winding releases the stored energy to provide the The first battery module is charged.
  • the first half cycle and the second half cycle constitute the cycle of alternate discharge of the first battery module and the second battery module, and the first time period and the second time period form the upper bridge switch tube and the lower bridge switch tube. cycle of alternating conduction.
  • the load connected to the power battery does not work, that is, the power battery simply heats itself, and the frequency of alternate discharge of the first battery module 1 and the second battery module 2 is less than the above.
  • the frequency at which the bridge switch tube and the lower bridge switch tube are alternately conducted The greater the frequency at which the upper bridge switch tube and the lower bridge switch tube are alternately conducted, the smaller the voltage fluctuation at both ends of the power battery will be, and the higher the reliability of the vehicle's power supply.
  • FIG. 7 is a schematic diagram of the current flow of another winding electricity storage process according to an exemplary embodiment of the present disclosure. The direction of the arrow in Figure 7 is when winding 3 stores electricity.
  • FIG. 8 is based on Figure 7
  • the embodiment shows a schematic diagram of the current flow during the winding discharge process.
  • the direction of the arrow in Figure 8 is the current direction of the discharge of the winding 3).
  • the lower bridge switch tube 5 is first connected to the upper bridge switch tube 4, which means that the lower bridge switch tube 4 is controlled to be turned on first.
  • the bridge switch 4 is turned off, allowing the second battery module 2 to store electricity to the target winding (as shown in Figure 9 .
  • Figure 9 is a schematic diagram of the current flow of another winding electricity storage process according to an exemplary embodiment of the present disclosure.
  • Figure The direction of the arrow in 9 is the direction of the current when winding 3 is storing electricity), and then after a specified period of time, the lower bridge switch 5 is controlled to be turned off, and the upper bridge switch 4 is turned on, so that the target winding charges the first battery module 1 (As shown in Figure 10,
  • Figure 10 is a schematic diagram of the current flow of a winding discharge process according to the embodiment shown in Figure 9.
  • the direction of the arrow in Figure 10 is the current direction of the discharge of winding 3).
  • the battery heating component further includes a bus capacitor, a first end of the bus capacitor is connected to the first end of the target bridge arm, and a second end of the bus capacitor is connected to the target bridge arm. The second end is connected; the load includes at least one driving load;
  • the controller 201 is configured as:
  • the target bridge arm is controlled to cause the first battery module to discharge, and the first battery module or the bus capacitor supplies power to the driving load to drive the vehicle. , and charge the second battery module;
  • the target bridge arm is controlled to cause the second battery module to discharge, and the second battery module or the bus capacitor supplies power to the driving load to drive the vehicle. , and charge the first battery module.
  • the controller 201 is configured to:
  • the lower arm of the target bridge arm is controlled to be turned on and the upper bridge arm is turned off, the second battery module is discharged, and the target winding is Energy storage, and the bus capacitor supplies power to the driving load;
  • the upper bridge arm of the target bridge arm is controlled to be turned on, and the lower bridge arm is turned off, and the second battery module is discharged to serve as the bus capacitance.
  • the target winding releases the stored energy to the first battery module to charge the first battery module.
  • the first battery module 1 and the second battery module 2 are alternately discharged to supply power to the load (such as the motor electronic control 1 and the motor electronic control 2), and at the same time, the first battery module is completed. 1 and the self-heating of the second battery module 2.
  • FIG. 11 is a schematic diagram of the current flow of another winding power storage process according to an exemplary embodiment of the present disclosure.
  • the upper bridge switch 4 is first controlled. is turned on and the lower bridge switch 5 is turned off, allowing the first battery module 1 to store electricity to the target winding (as shown in Figure 11, the direction of the arrow in Figure 11 is the direction of the current when winding 3 is storing electricity).
  • FIG. 12 is a schematic diagram of the current flow of a winding discharge process according to the embodiment shown in Figure 11. The direction of the internal arrow in Figure 12 is the current direction of the winding 3 discharge).
  • the first battery module 1 and the winding 3 They are connected in series to charge capacitor 6 and at the same time supply power to the load (motor electronic control 1 and motor electronic control 2).
  • the first battery module 1 completes the step-up power supply to the load, and on the other hand, the first battery module 1 completes the charging of the second battery module 2 , in the two processes of Figure 11 and Figure 12, the first battery module 1 has been discharging, and the second battery module 2 has been being charged.
  • the second battery module can be controlled to discharge, and the first battery module stops discharging, and the first battery module is discharged.
  • the bridge switch 5 is turned on, and the upper bridge switch 4 is turned off, so that the second battery module 2 stores electricity to the target winding (as shown in Figure 13 , which is another winding storage device according to an exemplary embodiment of the present disclosure.
  • Figure 13 Schematic diagram of the current flow of the electrical process. The direction of the arrow in Figure 13 is the direction of the current when winding 3 is storing electricity).
  • the precharged energy of capacitor 6 maintains the power consumption of the load (motor electronic control 1 and motor electronic control 2).
  • FIG. 14 is a schematic diagram of the current flow of a winding discharge process according to the embodiment shown in Figure 13. The direction of the inner arrow in Figure 14 is the current direction of discharge of winding 3).
  • the second battery module 2 completes the step-up power supply to the load, and on the other hand, the second battery module 2 completes the charging of the first battery module 1 , in the two processes of Figure 13 and Figure 14, the second battery module 2 has been discharging, and the first battery module 1 has been being charged.
  • the bridge arm of the motor controller can be reused as the target bridge arm, and the coil of the motor can be reused as the target winding.
  • the battery heating device further includes a first target switch, a first end of the first target switch is connected to the negative electrode of the first battery module and the positive electrode of the second battery module, and the third target switch is connected to the negative electrode of the first battery module and the positive electrode of the second battery module.
  • the second end of a target switch is connected to the N line drawn from the motor;
  • the controller 201 is configured to: when receiving a driving instruction, control the first target switch to turn off to perform the driving mode;
  • the first target switch When receiving a parking heating request command, a driving heating request command, or a balanced heating power supply request command, the first target switch is controlled to be turned on to enter the corresponding mode.
  • FIG. 15 is a circuit diagram of a battery heating device according to the embodiment shown in FIG. 2.
  • the target winding includes a three-phase winding, and the first end of the target winding is connected to the first target switch through the first target switch.
  • the negative electrode of the first battery module is connected to the positive electrode of the second battery module;
  • the controller 201 is used to control the first target switch K1 to close when it is determined that the vehicle is in driving heating mode, parking heating mode or voltage equalization heating mode, and to control the third target switch K1 when it is determined that the vehicle is in four-wheel drive mode.
  • a target switch K1 is turned off and supplies power to the three-phase winding through the target bridge arm to provide driving force to the vehicle.
  • the first target switch K1 is controlled to be turned on, and the target bridge arm is controlled according to the control method shown in Figures 11 to 12 to achieve the first battery module 1.
  • the first battery module 1 can charge the second battery module 2; control the target bridge arm according to the control method shown in Figure 13 to Figure 14 to realize the charging of the second battery module 2.
  • the first battery module 2 can charge the second battery module 1, thereby completing self-heating through staggered boost driving and driving the motor in the vehicle to control the driving of the vehicle. .
  • the first target switch K1 When the vehicle is in the parking heating mode, the first target switch K1 is controlled to be turned on, and the target bridge arm is controlled according to the control method shown in Figures 7 to 10, so that the first battery module and the second battery The modules charge each other through the target winding to heat the power battery.
  • the first target switch K1 When the vehicle is in the voltage equalization heating mode, the first target switch K1 is controlled to be turned on, and the target bridge arm is controlled according to the control method shown in Figures 3 to 6, so that the first battery module and the second battery module The group jointly supplies power to the load, and at the same time, the first battery module and the second battery module charge each other through the target winding to achieve heating of the power battery.
  • the battery heating device further includes: a second target switch, a first end of the second target switch is connected to the negative electrode of the first battery module and the positive electrode of the second battery module, and the second target switch is connected to the negative electrode of the first battery module and the positive electrode of the second battery module.
  • the second end of the two target switches is connected to the N line drawn from the motor;
  • a third target switch the first end of the third target switch is connected to the N line drawn from the motor, and the second end of the third target switch is connected to the motor of the electric drive system;
  • the controller 201 is configured to: in the multi-electric drive cooperative driving mode, control the second target switch to open and the third target switch to close or open to achieve multi-electric drive coordinated driving;
  • the second target switch is controlled to be closed and the third target switch is opened to enter the corresponding mode.
  • a six-phase motor can be formed to realize the control of a six-phase motor and a three-phase motor. Coordinated drive of phase motors.
  • the second target switch is controlled to be turned off, and the third target switch is turned off. When turned on, coordinated driving of three three-phase motors can be achieved.
  • FIG. 16 is a circuit diagram of another battery heating device according to the embodiment shown in FIG. 2.
  • the target winding includes a first set of winding coils and a second set of winding coils.
  • the first set The winding coil includes three coils.
  • the first end of the coil in the first set of windings is connected to the first end of the second target switch K2 and the first end of the third target switch K3.
  • the second end of the coil in the first set of windings is connected to the first end of the second target switch K2 and the first end of the third target switch K3.
  • the second ends of the coils in the second set of windings are respectively connected to the midpoint terminals of the bridge arms;
  • the target bridge arm can be controlled by referring to the motor control method of the full-bridge circuit in the prior art. This control method is relatively mature in the prior art, and this disclosure does not make any reference to this. limited.
  • the above technical solution realizes flexible control of the use of motor windings by reusing motor windings in vehicles, which can improve the flexibility and reliability of the vehicle driving process while reducing vehicle battery heating costs.
  • Another exemplary embodiment of the present disclosure provides a vehicle including the battery heating device described in any one of FIGS. 2 to 16 above.
  • any combination of various embodiments of the present disclosure can also be carried out, and as long as they do not violate the idea of the present disclosure, they should also be regarded as the contents disclosed in the present disclosure.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Un dispositif de chauffage de batterie comprend un dispositif de commande, une batterie d'alimentation, un enroulement cible et un bras de pont cible. La batterie d'alimentation comprend un premier module de batterie et un second module de batterie. Une première extrémité de l'enroulement cible est connectée à une électrode négative du premier module de batterie et à une électrode positive du second module de batterie, et une seconde extrémité de l'enroulement cible est connectée au point médian du bras de pont cible. Une première extrémité du bras de pont cible est connectée à une électrode positive du premier module de batterie, et une seconde extrémité du bras de pont cible est connectée à une électrode négative du second module de batterie. Le dispositif de commande est connecté au bras de pont cible, et est configuré pour : commander, dans un mode de chauffage de stationnement, le bras de pont cible pour amener le premier module de batterie et le second module de batterie à se charger et à se décharger en alternance, ce qui permet de chauffer la batterie d'alimentation.
PCT/CN2023/114074 2022-08-31 2023-08-21 Dispositif de chauffage de batterie et véhicule WO2024046163A1 (fr)

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CN202211059231.0A CN117673570A (zh) 2022-08-31 2022-08-31 电池加热装置和车辆
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110116653A (zh) * 2019-04-19 2019-08-13 清华大学 电动汽车驱动系统、驱动电路及电动汽车电池加热方法
US20200212520A1 (en) * 2018-12-29 2020-07-02 Contemporary Amperex Technology Co., Limited Battery heating system and control method thereof
CN111391718A (zh) * 2020-06-04 2020-07-10 比亚迪股份有限公司 电池能量处理装置、方法及车辆
CN111660875A (zh) * 2020-06-04 2020-09-15 比亚迪股份有限公司 车辆、能量转换装置及其控制方法
CN113506934A (zh) * 2021-06-24 2021-10-15 武汉理工大学 一种锂电池加热系统及加热方法
US20210359348A1 (en) * 2019-06-24 2021-11-18 Contemporary Amperex Technology Co., Limited Switch control device and method, motor controller, and battery pack heating control system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200212520A1 (en) * 2018-12-29 2020-07-02 Contemporary Amperex Technology Co., Limited Battery heating system and control method thereof
CN110116653A (zh) * 2019-04-19 2019-08-13 清华大学 电动汽车驱动系统、驱动电路及电动汽车电池加热方法
US20210359348A1 (en) * 2019-06-24 2021-11-18 Contemporary Amperex Technology Co., Limited Switch control device and method, motor controller, and battery pack heating control system
CN111391718A (zh) * 2020-06-04 2020-07-10 比亚迪股份有限公司 电池能量处理装置、方法及车辆
CN111660875A (zh) * 2020-06-04 2020-09-15 比亚迪股份有限公司 车辆、能量转换装置及其控制方法
CN113506934A (zh) * 2021-06-24 2021-10-15 武汉理工大学 一种锂电池加热系统及加热方法

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